Oamishirasato (大網白里市)

City

Chiba (千葉) — 2025 — Based on Basic Resident Register

Total Population

47,660

-520 (-1.08%)

Young (0–14)

9.5%

4,507

Working Age (15–64)

55.7%

26,553

Aging Rate

34.8%

16,600

Population Trends (2013–2025)

Breakdown by Sex (2025)

Category	Total	Male	Female
Total	47,660	23,526	24,134
Young (0–14)	4,507	2,317	2,190
Working Age (15–64)	26,553	13,480	13,073
Elderly (65+)	16,600	7,729	8,871

Annual Trends

Year	Total Population	0–14	15–64	65+	Aging Rate
2025	47,660	4,507	26,553	16,600	34.8%
2024	48,180	4,737	26,915	16,528	34.3%
2023	48,417	4,846	27,259	16,312	33.7%
2022	48,679	5,019	27,491	16,169	33.2%
2021	48,960	5,137	27,869	15,954	32.6%
2020	49,200	5,244	28,333	15,623	31.8%
2019	49,620	5,360	28,887	15,373	31.0%
2018	49,913	5,462	29,371	15,080	30.2%
2017	50,192	5,592	29,958	14,642	29.2%
2016	50,409	5,694	30,556	14,159	28.1%
2015	50,714	5,837	31,175	13,702	27.0%
2014	50,869	5,948	31,920	13,001	25.6%
2013	51,028	6,093	32,295	12,640	24.8%